Wholesale Marquise Diamonds in Tyler, Texas. Shira Diamonds Dallas specializes in Marquise Cut Diamonds. We have 100s of marquise cut diamonds for sale that are GIA Certified. This marquise cut diamond is E in color and VS1 in Clarity. The size of this marquise cut diamond is 0.70cts. If you would like to view this marquise cut diamond please give us a call at 214-466-1776.